Stump-puller or lifting-machine.



0. SHOETTLE. STUMP FULLER 0R LIFTING MAGHINE.

APPLICATION FILED APR. 30, 1902. N0 MODEL. Y

3 SHEETS-SHEET 1.

L ....ullggulmmunmu BQZYa eASLSeJ.

V @WQWW PATENTED APR. 28, 1903.

PATENTED APR. '28, 1903.

C. SHOETTLE.

STUMP FULLER 0R LIFTING MACHINE.

AFPLIOATIOH FILED APR. 30, 1902.

3 SHEETSSH T 2.

N0 MODEL.

No. 726,581. PATENTED APR. 28, 1903.

i 0. SHOETTLE. STUMP FULLER 0R LIFTIN APPLICATION FILED APR. 3

G MACHINE.

0. 1902. N0 MODEL. 3 SHEETS-SHEET 3.

UNITED STATES STUMP-PULLER OR LlFTlNG-IVIACl-ilNE.

fiPEGIFIGATION formingpart of Letters Patent No. 726,581, dated April 28, 1903.

Application filed April 30, 1902. Serial No. 105,415. (No model.)

To all whom it may concern:

Be it known that I, CHARLES SHOETTLE, a citizen of the United States, and a resident of Chicago, Illinois, have invented certain new and useful Improvements inStump-Pullers or' Lifting-Machines, of which the following is a specification, reference being ,had to the ac com panying drawingsfiorming apart thereof.

The purpose of this invention is to provide an improved mechanism for such purposes in the nature of lifting as require extreme power for comparatively short movement, and in detail it is specifically adapted for stumppulling.

ments and for adapting the entire lifting mechanism to the exigencies of stump-pullat-in g the lifting-screw.

.elevation of the same.

. of which, the lever 6, is

ing, as particularly set out in the claims.

In the drawings, Figure l is a side elevation of my machine; Fig. 2, an end or edge Fig. 3 is a detail section at the line 3 on Fig. 4:. Fig. 4 is a top plan omitting the si'tpporting-trucks, the legtimbers being broken away at one end. Fig. 5 is a detail section at the line 5 5 on Fig. a. Fig. 6 is a detail sideelevation of a gearingbracket and a gearing-train thereon for oper- Fig. 7 is a detail plan of one of the gears of the screw-operating train.

In the drawings, 1 l are the end supports of a frame, which comprises a top sill 2 and side trusses 3 3 for supporting the'stumppulling mechanism. This mechanism comprises a threaded lifting-rod 4, on which are two'nnts 5 5, which operate as stops for two lifters 6 and 7. These lifters are levers, one fulerumed at t on the sill 2, while the other is fnlcrumed at i) on the lower end of the suspending-links 10, but connected hylinks 11- with the lever 6. The leverdextends froinns fulcrum 8 in the oppower-th at is,

lever 7 between posite direction from the'connection with the links 11 to a point where it is operated upon by'the power mechanism, and between its fulcrum and the point of application of the on the opposite ofthe fulcrum from the connection of the links ll-lt has pivoted to it between its sidebars a collar 12, which is loose on the rod t below the upper nut 5, (but not immediately in contact with it, as hereinafter explained.) To the its fulcrum and its conuection to the link 11, the-re is similarly pivoted between its side bars a collar 13, below but not immediately in contact with the lower nut 5. It will be seen that this arrangement of levers is such that when the lever 6 is lifted at the point of application of the power the collar 12 is lifted with it, and the collar 13, and thereby the lever 7, is lowered, and that when said lever (3 is depressed at the point of application of the powcrreverso movement of the lever 7 occurs, so that said two levers considered at the point. of pivotal connection thereto of the collars 12 and 13 alternately approach andrecede from each other,each alternately rising and fallingalong the rod 4, their rising move1nents-which are their lifting movements-alternating with each other. For centain specific purposes hereinafter explained the collars lZ-and 13 are separated from the nuts, which respectively afford stops, by means of which they lift the rod by other parts; but these other parts are all free to move on the rod, so that theliftingaction is transmitted directly from the collars pivoted to the lifting-levers, respectively, to "the nuts above them. Considering this action independently of all accompanying details and features it will be noticed that when one lever-as the lever 6, for example-is lifting against the upper not 5 the lever 7 is withdrawing the collar 13 from the lower nut 53. If now means he provided for screwing the not 5 as-to follow the retreating lever 7, then when the movement is reversed and the lever 7 lifts the collar 13 it will lift against the nut 51 at the lower position to which said nut has followed the descent of the lever, and the upper lever U will be descending and carrying down the collar 12, while the lower lever is; lifting against the nut 5, and means being down on the rod, so

, mediate] y above said u the nut 5 to be carried down on therod to followthe descent of the lever 6 at the next change of direction of the movement the upper lever 6 will lift against thehnt' 5 at a still lower-position, and thus each alternation will give the lifters a lower hold on the rod, which will have been obtained by screwing down the nuts-without performing such action of the nuts while there is strain upon them, but, on the contrary, in the intervahduring which they are entirely free from the weightor strain of lift-- ing. 1 provide meansifor rotating the nuts in the intervals of the lifting action against them, respectively, by means of a gear-train con necied with a train fcrapplying the lifting power to the lever 6. This train mechanism will now he describe Thc'nuts 5 5 threaded gears, and they maybe hereinafter referred to as the gear-nuts. A gearing frame or hanger 14 has two bearings or sleeves 15, by which it is mounted on the rod 4, the upper collar 12 being lodged on the rod between these hearings so as to operate in the lifting action underneath and upward against the upper of said bearings,'and impper bearing is the upper gear-nut 5, sothat the lifting action of the collar is transmitted through the bearing 15 directly to the gear-nut precisely as-if the collar were lodged immediately under the nut. The lower gear-nut 5 islocated immediately below the lower bearing 15, and iinmediately belowsaid gear-nut on the rod is a spacing'sleeve 16, which is merely'for the purpose of covering the distance from. the lower collar "13 up' to the gear-nut 5*, by which it lifts the rod. in the above description certain parts designed to accommodate the lateral swing and. pull to which the rod 4 will be subjected in stumppnlling are not taken inteconsideration, but shcald be no ticed. ing 15 is convex and seats-in the collar 12,

whose npperend is' correspondingly concave,"

and below the end of the sleeve and above the collar rocker 18, which concave end'of the collar.

of the seats doesnotaffect in so far as thev'pre parts or bending of the rod 4 by theside strain to which it may be subjected. ,f'On-the hanger 14 there is journaled a shaft 19, having on it at upper-and lower ends twin gears and 20*, meshing, respectively, with the seats similarly in theupp'er The interposition the action, except gear-nuts 5 and 5%.. These twin gears are loose on the: shaft 19, but have frictional driving 'corinection with said shaft, the upper gear-20" being directly in contact with the lower side of a beveled pinion 21,,and the lower gear 2O being in contact with a washer or friction-plate 22 underneath it, the shaft if; having on it a nuhhea'd23, by which it is stcppedon the upper-side of the beveled pinion 2i and having at the lower end, which proare substantially interiorly 'lh us the lower endof the i1 pper bean 3 there is asimila,rl s' formed vent cramping of the trudes below the washer or friction-plate 22 a spring24, which is stopped by'a nut 25 on the threaded end of the shaft, by which the tension of the" spring may be adjusted to cause the pinion21 at the top and the friction-plate'22 at the bottom to press more 01 less tightly and with greater or less frictionupon vthe twin gears 20 and 20, respectively, to cause them to drive the gear-nuts 5 and 5, respectively, when not resisted by greater frictional ormore positive resistance. On the frame thereis mounted a,wheel 26, having a crank-shaft 2 7, and on the Wrist 28 of said crank-shaft there is pivoted a short link or pitman 29, which is pivotally connected to the lifting-lever 6 to operate it with vibratory motion' necessary to produce the actions already described. This wheel may be rotated by any means. I have shown acrank-handle by which .it may be rotated by hand; but in practice power from any suitable motor-may be appliedto drive it at any desired speed. On the bracket or hanger 14 there is journaled ashaft 30, having a bevel-gear 31,,meshing with the About the axis of the wheel 26 pinion 21. v there is pivoted a gear-frame 32, in which is journaled ashaft 33, havingapinion 34, meshing with the gear 26, while on the other end of the shaft there'is asprocke't-wheel 35, from Which a chain 36 extends aroundv a second sprockehwheel 37 on'tlie opposite end of the shaft fromxthe pinion 31 and communicates power to said.shaft,and pinion, and

on the bracket or hanger 14, for it will be noticed that there are virtually two trains branching from asingle source, one comprising the gear 20 and gear-nut 5, the other gear 20* and gear-nut 5 and these trains, which may'represent any more'extended train which may be found under some circumstances convenient to employ, may I ferred to as the, .gear-nut trains?) A link .38 connects the two. gear-frames l-tand 32, so that the oscillation ofthe former, which may take place under the stress of the lifting indirection more-or less oblique, will be communicated-i0 the latter-frame and prevent the slacking or straining of the drive-chain 36, which transmits the power from one frame to the other. i

Considering the/ mechanism thus far described, it should be noted that upon the rotation of the gear-wheel 26 by hand or power the lifting-levers will be vibrated in the manner already described,alternately approaching and receding from each other at the points at'which the collars 12 and 13am pivoted to them, respectively, for against the nuts/5 5, respectively, and that during all such movement in both directions the gear-trainsdescribed tend to keep both the gear-nuts rotating; butit will benoticed that the rotation of both the cute is trans znitted friction-ally from their trains and that neither will rotate whenever he hereinafter rerespective thereby to theremainder'of the train or trains the resistance to such rotation is greater than the driving friction. It will be evident,

' to a strain by friction greatly in excess of any normal driving friction which will be suitable merely to drive the nut when it is loose and free on the rod, and that therefore although, both trains leading to both nuts are continuously under power, so far as the frictional connection may transmit it, only the one which is free from the lifting strain will be rotated. The rotation of the wheel 26 in either direction will give identically the same lifting movement to the lifters 6 and 7; but in one direction it will rotate the nuts so that they will travel down on the rod, while rotation in the other direction would cause them to travel up. The direction of rotation which will causethem to travel down on the rods is manifestly the-direction in which the wheel should be rotated for lifting action. The rate at which thelifting-levers approach and recede fromeach other evidently is not uniform, being maximum when the crank-wrist 28 is horizontal or approximately. at that position and minimum, reducing to zero, when the wrist is passing over or under the center o fi, tl 1e shaft. The geartrain which rotates the-ngts-is. calculated to give the latter traverse onthe-rodat'aspeed a little greater, to allow for slipping at the frictional connection, than the maximum speed of separation or approach of the lifters. This causes the nut which is'not under lifting strain to follow the retreating lifterat a speed which will takeup any slack or play which it maybe necessaryt'o provide in the construction or adjustment to allowfor the stretch of theparts under the extreme weight or strain of the lifting, and yet to overtake the retreating lifter (or the spacing element between it and the nut) and press against it with-some little friction which may become sufficient to arrest the rotation even before' the weight shifts into the nut thus descending. This insures the nut being in contact with a lifter or with aspacing element between them when the weight is shifted by the crank-wrist passing the center, so that there is nojolt or sag in the action; but the pull is perfectly continuous, the strain being transmitted by the driving friction of the train to a sufficient extent totake up all slack and stretch before the weight is transmitted by the rotation of the crank.- It will "thus be seen' tnat automatically without attention from the operator under continuous rotation of the wheel 26 or other continuous means of vibrating the lever 6 the lifting will be carried on first against one nut and then against the other in continuous alternation without cessation of the lifting and without at any time lifting by the rotation of the nut or otherwise imposing upon the thread the strain of lifting while the nut is being rotated,-but, on the contrary, always rotating thenu't while it is free, except as under the driving-friction it may be forced "j caped out of reach of it.

into close contact with thepart which is next to lift against it and with only so much pressure on its thread as is measured by the same driving friction.

For the purposeof lowering a weight or stump after it has been lifted or pulled without employing special mechanism or disconnecting the lifting or nut-operating mechanism above described it will be seen upon inspection that it will be necessary to provide some means to prevent the gear-nuts from rotating, merely by reason of the fact that they are not carrying the weight, because when the train is reversed, as will be necessary to run the nuts up on the rod instead of down, so as to permit the rod to be lowered instead of raised, the nuts having a greater speed than the lifters,as already explained,and running away from the lifters instead of toward them by reason of their reversed movement when they have once started away will be free entirely from the restraint of the load and will continue to run away until they have run out of mesh with their driving-gears, or at least one of them which first makes this start will thus run out of mesh, while the other carrying the load will continue to carry it, I

- notwithstanding the lever which first carries the load may reverse its movement, because the nut against which the other lever should in turn operate to take the load will have es- If, however, means issp'rovi ded independently of the friction which" the load puts upon the gear-nuts to prevent their rotation except sufficiently to let them back on the rod at each change of movement of the lifting-leversas 'fanand as far only as the movement of the lever next to follow will lowerthe rod the reversion of the direction of the train necessary to run the nuts up instead of down will be all that will he'necessary to let the load down instead of lift it, the weight being carried first'upon one not and then upon the other and the nut which is not carrying the load being run up on the rod in the interval. For this purpose I provide a trip-lever 4:0, pivoted on the gearbracket 14, midway between the gears 20 20, said lever oscillating radially with respect to the gears and sufficiently tight on its pivot to retain either position within its range of oscillation to which it may be moved, a tensionspring 41, coiled on the pivot-screw 42, serving for the purpose of thus checking it against accidental displacement. From the proximate faces of the two gears 20 20 the teeth 43 43 project in such position that their path of rotation causes them to encounterthe finger or terminal M on the lever 40 at the end which stands nearest the axis, said terminal finger and said tooth being beveled, so that by the encounter of their beveled faces the lever is forced outward at that end and inward at the other endfand at the outward position to which it is thus moved said fingeris in position to be encountered bya stopfitooth 45, which projects from the face of the gear and which is without the beveled edge which would enable it to pass the terminal, so that on the contrary, it collides against itand' is locked to it, stopping the gear. I provide 5. these trip and stop teeth in the gears at such intervals as will permit thegear to'make so much of a rotation without being stopped as will give the gear-nut a travel'on the rod equal to th movement of thelifter in each 10' oscillation. The result of this construction is thatwhen. the train is reversed either lifter on which the weight may be resting being moved downward in its oscillation. will'let down the weight, the initial movement in IS that direction being accompanied by the release of the opposite gear-nut, and so by its rotation in direction to cause. it to travel" away from the lifter under it will'co'ntinue until the rotation and consequent travel of '20 vthe nut are stopped by the means described,

and the lifter having overtaken it and press-.

. ing against it takes the weighta'nd releases the other nut, which by the same action has been set free from the trip device, so that it z5,can rotate as soon as it is relieved of the load, and it in turn runs away from its lifter I to the limit of the rotation which is permit= ted-by the trip device and is stopped by the said device and held until the againstit, and thus reverses the act-ion. I The ousaction of the main train and the inter v 5 mittent and alternate action of the branch trains to the gear-nuts.- Y

I In operating the mechanism described the train shouldbe reversed for the purpose of lowering at the point at which the load shifts 40 from one lifter .to'the other, or ratherjust after the load has shifted, and the nut which has been taking the'weight is relieved by the shift. In order to throw the train which drives the gear-nuts out of connection with the vlifting-train at. any'point, so that the power may be stopped and started again and allowed to run so as to bring the crank- 'wrist around to the; proper pointfor taking up the action on the train with the reverse 5o movement, as described, I provide a clutch device for. connecting the sprocket-wheel ,35 with the shaft 33 and a shifting-lever 49 for throwing-this clutch into and out of engagement. A

5 5- I have shown the mechanism above described on a suitable frame adapted to operate as'a stump-puller and'for that'purpose to be transported from spot to spot, and for convenience in'serving this purpose it is pro- 60 vided with a pair of wheels on each of the lower sills 50 50 on theend frames 11, The wheels'51 51 are mounted upon the cranked ends 52 520E a lever-frame, which is conven-.-

ieutly made of iron bar,folded as shown in 6 5 the drawings, with its neck 53 adapted to be lodged across the sill 50 and retained by suitable box 54. With this construction the lifter over-. 30 takes it and brings the weight of the load wheels may be swung to either end or toward either end of the sill, and the frame being provided with means for looking it down in position at which the wheels protrude below the sill the end to which the wheels are thus thrown will ride on the Wheels, while the other end maydrag. Iprovide the hooks 55 55 for securing the frame in position described,

which being released will permit the wheels to rest upon the ground securely, taking the weight oh the wheels.

I claim- 1. A stump-puller, or lifting-machine, comprising a threaded'lifting-rod, two oscillating lifters and means for moving them up and down along the rod, nuts on the rod above the lifters respectively, adording, stops by which the lifters may lift therod in their respective upward movements, the upward movements of the two lifters alternating with each other, and means for rotating the nuts during the downward movements of the lifters with which they respectively cooperate to cause them t'ofollow such downward movements.

2 A stump-puller, or lifting machine, in

combination with a suitable frame, a threaded lifting-rod, two lifters, and means for moving them up and down along the rod, their upward movements alternating with each other,

nuts on the rod above the lifters respectively,

afiording stops by which the lifters may lift the rod in their respective upward movement's, gear-pinions rigid with the nuts respectively, and a gear-train for driving such pinions to rotate the nuts, such gear-train being con' nected with the means-for moving the lifters up and down, and means in such train for to tating the nuts alternately, each during the downward movement of the lifter with which it cooperates.

3, Astump-puller, or lifting-machinmcom Y prising, in combination with a suitable frame,

a threaded lifting-rod, two lifting-levers and means for vibrating them up and down along the rod, with their upward movements alternating, collars on the rod connected to said lifting-levers respectively, nuts on the rod above the collars respectively, affording stops by which the levers may lift the rod in their respective upward movements, and mechanism for vibrating the leversZand rotating the nuts ,to' cause the latter to follow the downward movements of the leveiswith which they respectively cooperate.

4, A-stump-puller, or lifting-machine, comprising, in combination with a suitable frame, athreaded lifting-rod, two lifting-levers fulcru mod on the frame, alink connectingthem, two collars on the threaded rod pinioned respectively to the two levers at opposite sides of their respective fulcrums, means foractu- "sting one of the'levers, operating thereon'at the opposite side-from its fulcrum and of the collar pivoted from the iinkconnection to the other lever, whereby the. collars are each lifted while theother is lowered, nuts on the lifting-rod,

codperating therewith, a train for running threaded rod above the collars respectively, affording stops by which the levers, through the medium of the collars, may lift the rod, and means connected with the lever-operating mechanism to rotate the nuts, the descending movement of the collars with which they respectively cooperate.

5. Astump-puller,orlifting machine, comprising, in combination with a suitable frame, a threaded lifting-rod, two levers and means for raising and lowering them alternately along the rod, nuts on the rod above the levers respectively, aifording stops by which the levers may lift the rod in their respective upward movements, gears on the nuts for rotating them, and a gear-train extending to the nuts respectively, friction driving connections in the train leading to each nut, and means for driving 4 such train during the movements of the levers in direction to screw the nuts downward on the rod, whereby, ,in' each lifting movement, the train for driving the nut which affords the stop for such lifting, is rendered idle by the slipping at the friction connection, andthe other train rotates its nut.

6. A stump-puller, or lifting-machine, in combination with asuitable frame, a threaded two lifters and nuts on the rod the nuts down on the rod in the intervals of the lifting actions against them respectively, a train for operating the lifters, the frame of the first-mentioned train being sleeved on the rod whereby its position is determined by that of the rod, a gear in the lifting-train and a pinion meshing therewith having its bearingframe pivoted about the axis of the gear, the driving-wheel on the pinion-frame and the driven wheel on train-frame, and means by which the former drives the latter, and a link connecting said frames whereby the change of position of the latter frame rocks the former about its ful crum without changing the distance between said driving and driven wheels.

7. A stumppuller, or lifting-machine, comprising a threaded lifting-rod, a loose collar thereon, a nut above the collar by which the latter is checked longitudinally, lever mech-- anism connected to the collar, mechanism for holdingthe rod at position to which it may be lifted, independently of the collar, and means for rotating the nut during such holding, whereby the rotation of thenut on the thread is performed without.friction due to stress of lifting or sustaining the weight.

8. In a stump-puller or lifting-machine, a threaded lifting-rod, two collars thereon,lever mechanism connected to the two collars for lifting them, nuts ,on the threaded rod above the collars respectively, to stop the collars longitudinally on the rod and afford abutments by which the collars may lift the rod, lever mechanism connected to the collars for alternately lifting them, and means for roeach during point the nut-operating with said shaft,

, by being stopped against tating each nut, during the lifting action, on the collar stopped by the other nut.

9. A stump-puller or lifting-machine, comprising a threaded rod, two collars loose thereon, a lever and fixed support on which it is fulcru med, a second lever suspended from the same support and linked to the first lever,

the collars being pivoted to said two levers respectively, the first lever being fulcrumed on the fixed support at a point intermediate the pivotal connection of the collar thereto and the pivotal connection of the link which extends to the other lever, said other lever havingthe pivotal connection of the collar to it between its point of suspension and the of the connection to it of the link; whereby the oscillation of said first lever in one movement lifts the collar pivoted to it, and in the other movement causes the other lever to lift its collar, nuts on the. threaded shaft above said collars respectively by which the latter are stopped for lifting the rod, and

-means for rotating the nuts respectively on the shaft alternately at the times at which the lifting is being done by the opposite collars respectively. a

10. Astump-pullerorlifting-machine,comprising a threaded shaft, two collars loose thereon, two lovers, one fulcrumed on the fixed support, the other suspended from such so pport and linked to the first lever, the col- 'lars being pivoted to the levers respectively,

one in position to be lifted by the movement of the lever which causes its link connection by the movement of its lever which causes -its link connection-to the other lever to rise,

nuts on the threaded rod above said collars respectively, by which the said collars are stopped for lifting the rod, a shaft having journal-bearings fixed with respect to one of the collars, and gears on said shaft meshing with the gear-teeth on the nuts respectively,

said gears having-friction driving connection low the gear, and means for rotating said shaft whereby the oscillation of one of the levers causing the :friction connection to @[i-. erate alternately upon the two gears as the lever is moved alternately inopposite directions, drives the two nuts alternately, and in the intervals lifts the two collars alternately.

11. Astump-puller orlifting-machine,comprising a threaded rod, a bracket comprising -a collar loose on the rod, a pinion screwedonto the rod above the collar, a second 'pinion screwed onto the rod and a collar below it loose on the rod, adapted to lift the latterthe pinion, a shaft, gears loose'thereon, engaging the pinions respectively, frictional disks on the shaft for one above and the other bedriving the loose gears; respectively, a lever fulcrumed on the fixed support, and a second lever suspended from such support and linked to the first lever,'the two collars being pivoted to said two lovers respectively,

one at [00 to the other lever to descend, and the other mm and between said fulcrum whereby the movement ofith'efirst lever in one direction lifts one of the onto the rod'above the ion screwed onto the rod,.and a collar below the opposite side of the levers fulcrum from its link connection with the other lever, and the other at the same side of the levers fuland thelink connection,

collars, and in the other direction causes theother-lever to lift the other collar, and means" for operating said first lever.

12. Astump-pulle'rorlifting-machine,comprising a threaded rod, a bracket comprising a collar loose on the rod, apinion screwed collar, a second pinit loose on the rod, adapted to lift the latter by being stopped against the pinion, a shaft, gears loose thereon, engaging the pinions'respectively, frictional disks on the shaft for driving the loose gears respectively, a lever fulcrumed on the fixed support, and a second lever suspended from'such support and linked to the first lever, the two"collars being pivoted to said two lovers respectively, one at the opposite. side vof the levers fulcrum from its,

link connection with the other lever, and the, other at the same side of the levers fulcrum and'between said fulcrum and the link connection,whereby the movement of the first lever in one direction lifts one of the collars, and in the other direction causes the other lever to lift the other collar, and means for operating said first lever; a gear-train comprisinga wheel having a crank-wrist oreqnivalent means for oscillating the lever nn'ect- .ed thereto, said train extending, and com-' prising also means for rotating the shaft formed ,pinions respectively,

whereby the lifting action of the leveris persimultaneously by the rotation of the shaft, and the frictional resistance caused by r .such lifting, acting alternately upon the two to be rotated alternately, each during the lifting action performed by means of the other.

13. A stump-puller orlifting-machine, comprising in combination with a suitable frame,

and releasing the other train, arranged to be operated for such locking and release by the moving train after so much movement only asadvances the not operated by on the rod a distance'equal to the lift of the lever in one oscillation.

In testimony whereof I have hereunto set my hand, in the presence of two witnesses, at Chicago, Illinois, this 4th day of April, A. D. 1902.

. CHARLES Sl-IOETTLE.

In presence of- CHAS. S. BURTON,

" I. W.. WESTERLAND.

causes the said pinions such train 

